US video pan&scan version contains an animated sequence before the main start that explains the definition of a Twister, featuring Bugs Bunny and the Tasmanian Devil.
The UK cinema version was uncut though all video/DVD releases were cut by 1 second to remove two instances of the word "fuck" in order for the film to receive a PG rating. The BBFC added that "The swearing was very indistinct and we didn't hear it on the cinema version, but VHS and DVD versions are cut to remove it".
The video version also includes a message after the end credits from a FEMA representive stating that a brochure is available via a 1-800 number and your video rental store on how to prepare your family for a Tornado.
The letterbox video doesn't include the above additions.